• To use:

  Pair p = minmax(data);
  cout << p.get_first() << " " << p.get_second() << "\n";

Example: non-template class:

class Pair
{
   public:
      Pair(int a, int b);
      int get_first() const;
      int get_second() const;
   private:
      int first;
      int second;
};